fuel pressure keeps going down - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 12-14-2010, 04:33 AM Thread Starter
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Unhappy fuel pressure keeps going down

my pressure was 52p @ idle and 43p @ wot so I changed my regulator spring to the longer blue one. Someone had done the bb mod so O took that out and put in the new spring and had the same pressure 52p and 43p so I put the bb back in with the new spring and was at 70p @ idle and 65p @ WOT just where I wanted it. Now every day it has come down a little at a time. The day after the mod it was at 68p @ idle the next day 65p @ idle and 58p @ WOT now today it is at 62-63p @ idle and 56-58p WOT WHAT GIVES!! I have no leaks. The fuel pump was replaced 2yr ago and also has a summit raceing pusher pump to give extra pressure and all works. Any help please. The only change is the weather has gotten colder.


2004 F250 4x4
1) head studs
2) 4" turbo back exhaust MBRP muffler
3) super expensive built transmission
4) leveling kit and 3.73 gears with a locker
5) Full EGR delete
6) Air Dog 2 165
7) full set of gauges
8) ladder bars
9) smoke switch (I Don't use it)
10) eliminated banjo bolts for 90 degree fittings
11) tuned by lots of people
12) ported heads
13) 190/75%
14)Powermax turbo

Last edited by jimmyz32; 12-15-2010 at 04:26 AM.
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post #2 of 2 Old 12-14-2010, 11:43 AM Thread Starter
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no one can help me?


2004 F250 4x4
1) head studs
2) 4" turbo back exhaust MBRP muffler
3) super expensive built transmission
4) leveling kit and 3.73 gears with a locker
5) Full EGR delete
6) Air Dog 2 165
7) full set of gauges
8) ladder bars
9) smoke switch (I Don't use it)
10) eliminated banjo bolts for 90 degree fittings
11) tuned by lots of people
12) ported heads
13) 190/75%
14)Powermax turbo
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